[Bug 2081222] Re: do-release-upgrade fails saying "may be caused by unofficial packages"

[Nick Rosbrook]

*** This bug is a duplicate of bug 1970018 ***
    https://bugs.launchpad.net/bugs/1970018

Reviewing the files from your upgrade attempt, you have installed
packages from the deadsnakes PPA. Some of the packages installed are
newer than those in the official archive, which is keeping some python
packages installed which then prevents the upgrade from being
calculated. Please try using the ppa-purge tool to remove packages
installed from ppa:deadsnakes/ppa. After that you can try upgrading
again and if it still fails open a new bug report. Thanks and good luck!

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Confirmed => Invalid

** Tags added: deadsnakes-ppa

** This bug has been marked a duplicate of bug 1970018
   Cannot upgrade to ubuntu 21.10 from ubuntu 20.04.

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https://bugs.launchpad.net/bugs/2081222

Title:
  do-release-upgrade fails saying "may be caused by unofficial packages"

Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid

Bug description:
  It used to say "may be caused by unofficial packages not provided by
  Ubuntu", but the log files I was directed to had hundreds of entries
  saying "could not find a suitable alternative for x package". Many of
  these packages were in fact installed from apt, so I don't know which
  packages are actually causing issues and which messages are normal. I
  then completely reset my /etc/apt/sources.list and
  /etc/apt/sources.list.d, but it still errors, and now without the "may
  be caused" message. "Could not calculate; unresolvable problem occurs;
  if none of this applies"

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.20
  ProcVersionSignature: Ubuntu 6.8.0-45.45~22.04.1-generic 6.8.12
  Uname: Linux 6.8.0-45-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.6
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Sep 19 15:37:03 2024
  InstallationDate: Installed on 2023-11-03 (321 days ago)
  InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/usr/bin/zsh
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to jammy on 2024-09-19 (0 days ago)
  VarLogDistupgradeTermlog:

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